Variable-frequency pulse detonation ash removal structure with self-adaptive pressure relief function

The invention discloses a variable-frequency pulse detonation ash removal device with a self-adaptive pressure relief function, and belongs to the field of cleaning. Comprising a two-stage self-adaptive pressure relief device and a knocking ash removal structure. An airflow collecting pipe, a self-adaptive return spring, a thrust roller bearing, a second-stage pressure relief main body and a second-stage pressure relief shell are sequentially positioned and connected in the axial direction of the main flow channel; the detonation ash removal structure comprises a first-stage pressure relief section, a mixing section, an ignition section and a detonation chamber with Shchelkin spirals, wherein the first-stage pressure relief section, the mixing section, the ignition section and the detonation chamber are communicated one by one. After being shunted by a secondary self-adaptive pressure relief device, an oxidant is mixed with fuel at an equal-diameter throat part of a mixing inner cylinder to generate explosive